doubler

Noun

 * 1) One who doubles.
 * 2) An instrument for augmenting a very small quantity of electricity, so as to render it manifest by sparks or the electroscope.
 * 3)  A metal plate riveted or welded over a preexisting metal structural component to reinforce it and relieve the stress on the preexisting component, or to serve as a patch where part of the original structure has failed or been removed.
 * 4) Part of a distilling apparatus for intercepting the heavier fractions and returning them to be redistilled.
 * 5)  A blanket or felt placed between the fabric and the printing table or cylinder.
 * 6) A person employed in a roller mill to fold the hot metal plates in half.
 * 7) A device with two electrical plugs that plugs into an electrical outlet, effectively converting the electrical outlet into two; socket converter.
 * 8) A diaper insert.
 * 1) A device with two electrical plugs that plugs into an electrical outlet, effectively converting the electrical outlet into two; socket converter.
 * 2) A diaper insert.

Noun

 * 1)  A tenement house having two families on each floor.
 * 2)  A biplane aeroplane or kite.

Etymology
, from, from. Compare 🇨🇬 and 🇨🇬, 🇨🇬, 🇨🇬.

Verb

 * 1) to double, duplicate
 * 2) to double-cross
 * 3) to overtake, pass
 * 4)  to dub
 * 5)  to repeat a school year
 * 6) to line (a coat)
 * 1)  to dub
 * 2)  to repeat a school year
 * 3) to line (a coat)
 * 1) to line (a coat)
 * 1) to line (a coat)